Boiler-flue swage.



J. G. TASSEY. BOILER FLUE SWAGE. APPLICATION FILED MAY22,1913.

-w' uemioz atto'owua o Patented July 7, 1914.

3 SHEETS-SHEET 1.

i- 6 J06 a film wi/twmoow THE NORRIS PETERS CO.. PHUTO-LITHOY.WASHINGTON, D C.

J. O. TASSEY.

BOILER FLUE SWAGB.

APPLICATION FILED MAY 22, 1913.

Patented July 7, 1914 3 SHEETS-$112111 3. 1 1 E- 1 U m If mrrfim lr f 'M,v v F u 60 JQT' siren STATES PATENT orrron.

JOE CEPHAS TASSEY, OF NASHVILLE, TENNESSEE.

BOILER-ELITE SWAGE.

' ing to be a full, clear, and exact descrip- 'tion of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to metal bending, and more especially to pipeexpanders and fiangers; and the object of the same is to produce animproved swaging machine for forming an annular crimp in boiler fluesnear their ends. This object is carried out by the improved machinehereinafter more fully described and claimed, and as shown in thedrawings wherein- Figure 1 is a plan view, and Fig. 2 an end elevationof this machine complete.

F igs. 3 and 1 are sections on the lines 33 and 1-1 of Fig. 1respectively. Figs. 5 and 6 are enlarged sections on the lines 5-6 ofFig. 2, showing the parts in different positions as will be explainedbelow. Figs. 7 and 8 are cross sections taken on the lines 7-7 and 88respectively of Fig. Figs. 9 and 10 are sections on the line 9-10 ofFig. 1, with the parts in different positions. Fig. 11 is a detailshowing the treadle mechanism. Fig. 12 is a detail sectional view of thethree-way valve, displayed in connection with the cooling system.

The bed. 1 of this machine carries bearings 2 in which is journaled amain shaft 3 carrying an eccentric 4 at its front end, a ring 5 having acam groove 6 between said bearings, and a clutch element 7 splined onthe shaft as at 8 in rear of the rearmost bearing 2; while a large gear9 driven by a power gear 10 runs loose on the rear ex-v tremity of theshaft 6 and is held in place by a collar 11, this gear carrying anotherclutch element 1.2 as best seen in Fig. 1. The element 7 is pressed intonormal engagement with the element 12 by means of a spring 13 coiled onthe shaft between a collar 14 thereon adjacent the rearmost bearing 2,and the rear end of said element. The latter also carries one or moreradial cam faces 15 adapted to be struck by the upper end of a pin 16which moves vertically within a guide 17 as best seen in Figs. 3 and 11.The lower end of this pin has Specification of Letters Patent.

Application filed May 22, 1913.

Patented July '7, 191 1.

Serial No. 769,256.

a groove 18 loosely engaged by a fork 19 at one end of a lever 20 whichis pivoted at 21 between its extremities and carries a weight 22 at itsother end, and weight normally raises the pin into engagement with saidcam face as will be clear. A. treadle 23 is connected by a rod 2 1 withthe lighter end of said lever'20, and when the treadle is depressed theweight is raised and the pin is retracted. With this construction ofparts, the power gear 10 drives the large gear 9 constantly, and thisruns free on the shaft 6 unless the clutch elements 7 and 12 areengaged. The expansion of the spring 13 holds said elements normallyengaged, and therefore the main shaft would rotate constantly if it werenot for the treadle mechanism illustrated in Fig. 11. The normaltendency of the weight 22 is to raise the pin 16, and the rotation ofthe clutch 7 brings its cam face 15 into contact with the pin andautomatically retracts its clutch teeth out of engagement with those onthe element 12. So that the addition of the treadle mechanism and weightovercomes the normal tendency of the driving mechanism to rotate themain shaft constantly. When now the operator places his foot on thetreadle, he draws the pin downward, releases the clutch element 7 andpermits the spring 13 to throw this element into engagement with theelement 12, so that the rotation of the main shaft by the gear wheel 9is resumed. Thus it will be seen that as long as the operator keeps hisfoot on the treadle, the main shaft will rotate and the parts driventhereby will be actuated, but as soon as he removes his foot the treadlemechanism automatically raises the pin and automatically disengages theclutch elements to stop the rotation of the main shaft.

.As above stated, the purpose of this machine is to put a crimp in aboiler flue near its end. Such crimp is formed by expanding an annularband in the flue or pipe and simultaneously compressing or swaging thesame from the exterior. To perform these operations simultaneously twosets of tools or dies are required, one working on the interior and theother on the exterior of the flue or tubes; but both are driven by themain shaft through means which will yet be described.

Carried by the bed is a ring-shaped casing having a hole 31 through thecenter of its front wall in which the flue F is inserted as shown inFig. 6, and mounted in radial guides 32 in said casing are dies 33 whoseinner ends are shaped to put the crimp C on the exterior of said flue.Rotatably mounted around the casing is a ring 34 having an ear 35 at onesideto which at 36 is pivoted a rod 37, one end of which is screwed at38 into a boss 39 formed on an eccentric band 40 which surrounds theeccentric 4, and the rotation of the latter will therefore oscillate thering 34 around the casing 30. The outer end of each slot or guide 32 islaterally offset as shown at 42 in Fig. 10, and the outer end of eachdie 33 is pivoted at 41 to a link 43 whose outer extremity in turn ispivoted at 44 to said ring. Then now the cam shaft is rotated, it willbe seen that the eccentric and its connection with the ear 35 cause thering to oscillate; and when the ring turns to the right as seen in Fig.9, the several dies 33 are retracted, whereas when it turns to the leftas seen in Fig. 10, the several dies are projected so that their innerends come into engagement with the flue F.

Secured to the back of the casing 30 is a sleeve within whose reducedrear end reciprocates a tapered bolt or expander 51. Engaging the groove6 in the ring 5 is a roller 52 at one end of a lever 53 which is pivotedat 54 on a suitable standard 55 rising from the bed 1, and the other endof this lever is pivotally connected by twin links 56 with the rear endof an eye bolt 57 whose forward end is screwed into said expander 51 asat 58 and held in adjusted position by means of a jam nut 59. Thus whenthe main shaft rotates the lever rocks on its pivot and the expander isreciprocated longitudinally within the rear end of the sleeve 50. Projecting from the wall'of said sleeve radially inward into its bore arepins 60 slidably engaging radial sockets 61 formed in a series ofinternal dies or wedges62, and the body of each wedge has a socket G3 inwhich is mounted an expansive spring 64 hearing the wedge normallyinward as the spring presses outward against the bore of the sleeve 50.The inner sides of these wedges are shaped to fit the exterior of thetapered bolt or expander 51, while their outer sides are provided withsuitable die-faces or projections 65 to groove the interior of the flueF directly opposite its crimp C as shown in Fig. 6. By preference thevarious wedges are also provided with radial projections whichcollectively make up a shoulder 66 that rests squarely against the frontend of the sleeve 50. The latter may be rendered removable from thecasing 30 as by'means of screws 67 so that another set of dies or wedges62 may be substituted when desired. In like manner the face plates 68 ofthe casing may be rendered removable by any suitable means, so thataccess may be had to its interior when it is desired to replace the diesout of engagement with the cam face 15 of the clutch element 7, thespring 13 expands and throws the two elements 7 and 12 into engagementso that the rotation of the driving gear 9 is now communicated tothemain shaft 6. Rotation of the latter causes oscillation of the ring34 and reciprocation of the dies 33 ina manner above described, and therotation of the main shaft also causes the swingmg movement of the lever53'and therefore the reciprocation of the expander 51 so that the wedgesare first pressed outward by the forward movement of said expander, andthen borne inward by the expansion of their own springs as the expanderis retracted. The parts will be so timed that the inward movement of theouter dies-and the outward movement of the inner dies will occursimultaneously, and the result will be that in a very short time a crimpC is formed on the flue F at the points illustrated in Fig. 6.Suchaction of the various dies will continue as long as the operatorkeeps his foot on th treadle 23, but when he removes it the.

weight 22 will cause the lever 20 to move on its pivot 21, with theresult that the pin 16 will rise and its tip will be engaged by the camface 15 on the clutch element? the next time the latter revolves. Thiscauses the automatic movement of the clutch to the right as shown inFig. 1 with the result that the spring 13 is compressed and the clutchteeth are thrown out 'of engagement so that the rotation of the mainshaft 6 ceases, although the rotation of the gears continues as before.

In connection with the above-described mechanism 1 preferably employ asystem for cooling the dies and for blowing the scales out of the flueswhich are being swaged. This includes a pipe 70 led from a source ofcompressed airto and through a three-way valve 71 (see Fig. 12) one armof which is connected with a tank or cylinder 7 2 and the otherarm, 73,of which leads to the swaging mechanism. On the stem of the valve isfixed a crank arm 7 5 connected by a link 7 6 with a rock lever 77 whichis pivoted at 7 8 to a suitable bracket carried on the frame- }work, andWhose other end has a roller 79 "engaging a groove 80 in the clutch 7.The ports in the three-way valve are so disposed that when the clutchelements 7 and 12 are engaged the air pipe 70 delivers the air into thetank 72, but when the clutch element 7 is retracted as seen in Fig. 1its groove 80 acts on the roller 79 and rocks the lever 77 with itheresult that the link 76 turns the arm 75 and causes the ports of thevalve to cut off the supply pipe and throw the tank 72 intocommunication with the branch pipe 73. The result of this switching ofthe air is that what has been stored or compressed within the tank 72 isnow delivered through the branch 73 whose other end is directed againstthe dies which have doubtless become hot during the operation of swagingthe flue and also directed into the end of the latter so as to blow outany chips or scales which may have been formed in the operation of themachine. Attention is directed to the fact that the action of thisattachment is entirely automatic, because no air is delivered to themachine while the main shaft is rotating and the dies are performingtheir functions, and on the contrary air from the tank is delivered forcooling purposes when the main shaft comes to rest; but, havingexhausted the tank, the air will not be wasted if the parts arepermitted to remain in this condition as they would have to do if theoperator were changing the dies. The parts of this machine are of thedesired proportions, materials, and construction consistent with thefollowing claims:

Vhat is claimed as new is:

l. in a swaging machine, the combination with dies, means for moving thesame, a main shaft, and connections between said shaft and means; of acollar fast on the shaft, a clutch element splined on the shaft andhaving teeth in one end, a gear loose on the shaft and having teethadapted to engage those on said element, means for throwing the clutchteeth normally into engagement, manually controlled means fordisengaging them, a three-way valve whose inlet communicates with asource of compressed air supply and whose outlets are led respectivelyto a tank and to the tool, an arm on the valve stem, a rock leverpivoted on a support and actuated. by the longitudinal movements of saidclutch element, and a link connecting the lever with said arm on thevalve stem, for the purpose set forth.

2. in a swaging machine, the combination with dies, means for moving thesame, a main shaft, and connections between said shaft and means foractuating the latter; of a collar fast on the shaft, a clutch elementsplined on the shaft and having teeth in one end and a cam face on itsperiphery, a gear loose on the shaft and having teeth adapted to engagethose on said element, an expansive spring between said collar andclutch element for throwing the clutch teeth normally into engagement, apin adapted to be projected into the path of said face for disengagingsaid clutch teeth, a three-Way valve whose inlet communicates with asource of compressed air supply and whose outlets are led respectivelyto a tank and to the tools, an arm 011 the valve stem, a rock leverpivoted on a support and having a roller at one end, said clutch elementbeing provided with a groove engaging this roller, and a link connectingthe other a "m of this lever with said arm on the valve, for the purposeset forth.

3. In a flue swaging machine, the combination with a series of internaldies having die faces on their outer sides and their inner sidesbeveled, a sleeve inclosing the dies, springs pressing the dies normallyinward, and a tapered bolt for spreading said dies; of a casing securedto the sleeve and having radial guides, a series of external diesmovable in said guides, actuating mechanism for forcing said dies inwardor retracting them, a main shaft having a cam and an eccentric,connections between said cam and tapered bolt, and connections betweensaid eccentric and the actuating mechanism for moving all the diessimultaneously.

4-. In a flue swaging machine, the combination with a series of internaldies having die faces on their outer sides and their inner sidesbeveled, a sleeve inclosing the rear ends of said dies, springs in thelatter bearing outward within the sleeve and pressing the dies normallyinward, and a tapered bolt for distending said dies; of a casing securedto the sleeve and having radial guides, a series of external diesmovable in said guides, actuating mechanism for forcing said dies inwardor retracting them, a main shaft having a. cam and an eccentric,connections between said cam and tapered bolt, connections between saideccentric and the actuating mechanism for moving all the diessimultaneously, a power gear, a large gear meshing therewith and looseon said shaft, its hub having clutch teeth, a clutch member splined onsaid shaft and having teeth adapted to engage those on said hub, andmeans for moving this member.

5. In a flue swaging machine, the co1nbination with an upright casinghaving an axial hole and radial guides offset at their outer ends, aseries of dies slidably mounted in said guides and a link pivoted to theouter end of each die; of a ring rotatably mounted around said casingand pivotally connected with the outer end of each link, and means foroscillating the ring.

6. In a flue swaging machine, the combination with a casing having anaxial hole and radial guides offset at their outer ends, a series ofdies sliolably mounted in said guides, and a link pivoted to the outerend of each die; of a ring rotatably mounted around said casing andpivotally connected with the outer end of each link, an ear projectingfrom said ring, a power shaft having an eccentric, and connect-ionsbetween the eccentric band and ear for oscillating the ring around thecasin 7. In a flue expander, the combination with a casing having a holefor the flue,,a sleeve secured to said casing with itsaxis in line withsaid hole, pins projecting radially inward within said sleeve, a seriesof dies located in the sleeve and having sockets loosely engaging saidpins, and expansive Springs between the dies and the wall of the sleeve;of a tapered bolt movable longitudinally within said sleeve and havingits conical end projecting bet-ween said dies, and means for moving thebolt forward and backward.

8. In a flue expander, the combination with a casing having a hole forthe flue, a sleeve secured to said casing with its axis in line withsaid hole, pins projecting radially inward within said sleeve, a seriesof dies located in the sleeve and having sockets loosely engaging saidpins, and expansive springs between the dies and the wall of the sleeve;of a bolt slidable longitudinally within said sleeve and having apointed front end disposed between said dies and a threaded socket atits rear end, an eye bolt whose shank is adjustably engaged in saidsocket, a power-driven rocking lever, and links connecting one end ofsaid lever with the eye of the bolt, for the purpose set forth.

9. In a flue expander, the combination with a casing having a hole forthe flue, a sleeve secured to said casing with its axis in line withsaid hole, pins projecting radially inward within said sleeve, a seriesof dies located in the sleeve and having sockets loosely engaging saidpins, and expansive springs between the dies and the wall of the sleeve;of a bolt slidable longitudinally within said sleeve and having apointed front end disposed between said dies and a threaded socket atits rear end, a threaded member adjustably engaging said socket, a rocklever pivoted between its ends, connections between one end and saidthreaded member, a power shaft having a cam groove, and a roller at theother end of said lever engaging said groove, for the purpose set forth,H

10. In a flue expandenthe combination with a casing having a hole forthe flue, a sleeve secured to said casing with its axis in line withsaid hole, and a series of dis located in thesleeve; of a bolt slidabelongitudinally within the sleeve and havi U a pointed front end disposedbetween the dies and a socket at its rear end, a member adjustablyengaging said socket, a rock lever pivoted between its ends, connectionsbetween one end and said threaded member, a power shaft having a camgroove, and a roller at the other end of said lever engaging saidgroove, for the purpose set forth.

11. In a flue swaging inachine,'the combination with a series ofinternal dies having die faces on their outer sides and their innersides beveled, and a tapered bolt for distending said dies; of a casinghaving radial guides, a series of external dies movable in said guides,actuating mechanism for forcing said dies inward or retracting them, amain shaft having a cam and an eccentric, connections between said camand tapered bolt, connections between said eccentric and the actuatingmechanism for moving all dies slmultaneously, a power gear, alarge .gearmeshing therewith and loose on said shaft, its hub having clutch teeth,a clutch member splined on said shaft and having teeth adapted to engagethose on said hub,

and means for moving this member.

In testimony whereof I have hereunto set my hand in presence of twosubscribing wit-o nesses.-

JOE CEPI-IAS TASSEY. Witnesses:

J. B. BRADLEY,

H. E. JACKSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of-ZPatents,

' Washington, D. 0.

